Radar Display Image Scaling Without Erasure
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Solution Overview
Problem
Conventional radar systems face the issue of target images becoming unusable when switching between detection ranges, requiring the erasure of previously stored images to accommodate new range scales, which disrupts continuous recognition of target ships or movements.
Innovation Solution
Implementing a method to convert past target images stored in the former range scale to fit the new range scale, allowing for continuous display without erasure, using a signal processor and image processor that transfer and smooth data between frame and video memories to adjust image size and scale.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If target images are stored in the frame memory for continuous display, then the imaging information is preserved, but when the range scale is changed the stored images become unusable and must be erased
Solution Approach 1:
The patent creates a copy of the past target image data from frame memory and stores it in video memory. This copy can then be independently processed and displayed at different range scales without affecting the original stored data in frame memory, resolving the contradiction between preserving information and adapting to range changes.
Solution Approach 2:
The patent introduces video memory as an intermediary between frame memory and the display system. This intermediary allows the past target images to be transferred, processed, and displayed at different range scales without requiring erasure of the original data, thus maintaining both information preservation and range adaptability.
2Adaptability or versatility
If the range scale is changed to improve detection coverage, then the display range is adjusted, but previously stored target images do not fit the new scale and become unusable
Solution Approach 1:
By copying past target image data from frame memory to video memory, the system enables independent scaling and processing of the copied data without losing the original information. This allows the display to adapt to new range scales while preserving all historical target image data.
Solution Approach 2:
The patent changes the display parameters by transferring images from frame memory to video memory where they can be processed at different scale parameters. This allows the system to maintain the original captured images while displaying them at various range scales by modifying only the display parameters, not the stored image data.
3Loss of information
If past target images are preserved across range changes, then continuous recognition is maintained, but the images must be processed and transferred between memories
Solution Approach 1:
Video memory serves as an intermediary that simplifies the overall system architecture. By transferring past images to this intermediate storage, the system maintains continuous target information across range changes while the complexity of memory management is localized to the transfer process between two dedicated memory units.
Solution Approach 2:
The patent segments the memory system into frame memory for capturing new images and video memory for storing and processing past images. This segmentation allows independent management of current and historical data, enabling continuous target recognition while organizing the complexity into manageable, functionally separated memory components.
Data Source
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AI summary
Methods and apparatuses are disclosed which process sensing signals. A method for redrawing a sensing image when a range is or has been changed, according to one aspect of the present invention, records the sensing image and outputs the sensing image to a display (14); records additional information displayed upon a screen and outputs the additional information to the display (14); computes a new image from the recorded sensing image using an image manipulation computer function, so that the computed image fits a new scale of the changed range, and recording the computed image; and computes changes to the recorded additional information to adjust the addition information to the new scale of the changed range, and records the computed additional information.